.w_100{width:100%;}
.h_100{height:100%;}
.h20{height: 20px;}
.h30{height: 30px;}
.h40{height: 40px;}
.h50{height: 50px;}
.h60{height: 60px;}
.h80{height: 80px;}
.h100{height: 100px;}
.wh_100{
  width: 100%;
  height: 100%;
}

/* 外边距 */
.mg10{margin:10px;}
.mg20{margin:20px;}
.mg30{margin:30px;}
.mg40{margin:40px;}
.mt5{margin-top:5px;}
.mt10{margin-top:10px;}
.mt15{margin-top:15px;}
.mt20{margin-top:20px;}
.mt30{margin-top:30px;}
.mt40{margin-top:40px;}
.mt50{margin-top:50px;}
.ml5{margin-left:5px;}
.ml10{margin-left:10px;}
.ml20{margin-left: 20px;}
.ml30{margin-left:30px;}
.ml50{margin-left:50px;}
.mr3{margin-right:3px}
.mr5{margin-right:5px}
.mr8{margin-right:8px}
.mr10{margin-right:10px;}
.mr20{margin-right:20px;}
.mr40{margin-right:40px;}
.mb5{margin-bottom:5px;}
.mb10{margin-bottom:10px;}
.mb15{margin-bottom:15px;}
.mb20{margin-bottom:20px;}
.mb30{margin-bottom:30px;}
.mb80{margin-bottom: 80px;}

/* 内边距 */
.pd10{padding:10px;}
.pd15{padding:15px;}
.pd20{padding:20px;}
.pd25{padding:25px;}
.pdlr5{padding:0 5px;}
.pdtb20{padding:20px 0;}
.pdlr10{padding:0 10px;}
.pdlr15{padding:0 15px;}
.pdlr16{padding:0 16px;}
.pdtb10{padding:10px 0;}
.pdtb30{padding:30px 0;}
.pdtb8{padding:8px 0;}
.pt5{padding-top:5px;}
.pt10{padding-top:10px;}
.pt20{padding-top:20px;}
.pt40{padding-top:40px;}
.pt50{padding-top:50px;}
.pl10{padding-left:10px;}
.pl20{padding-left:20px;}
.pr2{padding-right:2px;}
.pr5{padding-right:5px;}
.pr15{padding-right:15px;}
.pr30{padding-right:30px;}
.pb8{padding-bottom:8px;}
.pb20{padding-bottom:20px;}
.pb30{padding-bottom:30px;}
.pb50{padding-bottom:50px;}
.pb80{padding-bottom:80px;}

.fz16{font-size: 16px;}
.fz18{font-size: 18px;}
.fz20{font-size: 20px;}
.fz22{font-size: 22px;}
.fz24{font-size: 24px;}

.c409EFF{color: #409EFF;}

.flex_center {
  display: flex;
  justify-content: center;
  align-items: center;
}

.flex_between {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.flex_column {
  display: flex;
  flex-direction: column;
}

.pointer {
  cursor: pointer;
}


.clear_float::after{
  content: '';
  display: block;
  clear: both;
}